Several years ago, I had one of these revolvers and tried a conversion. It's a simple matter to replace the offset firing pin with a centerfire one, and the cylinders aren't timed differently. To make it work properly, the offset hole in the recoil shield has to either be welded up and redrilled, or a bushing installed. I simply egged the side of the hole out a bit so the centerfire firing pin would go through and hit the primer. But, as previously mentioned, this creates a problem of the primers actually being blown back through the hole. This is bad enough, from a safety standpoint, but it also has a secondary problem that no one has mentioned yet - the gases blown back out of the case and through the recoil shield are of sufficient pressure and velocity to blow the hammer back and turn the cylinder, and it will keep firing as long as you keep the trigger pulled. Having become accustomed to not being behind bars and not wanting to put my welding and/or machining skills to the test, I reinstalled the offset black powder firing pin and original cylinder and continued to shoot it as designed until I sold it some years ago.
